EP 4039397 A1 20220810 - PREHEATING POWER SUPPLY TO CONTROL WELD CURRENT IN A PREHEATING SYSTEM
Title (en)
PREHEATING POWER SUPPLY TO CONTROL WELD CURRENT IN A PREHEATING SYSTEM
Title (de)
VORWÄRME-LEISTUNGSQUELLE ZUR STEUERUNG DES SCHWEISSSTROMES IN DER VORWÄRME-LEISTUNGSQUELLE
Title (fr)
SOURCE DE PUISSANCE DE PRÉCHAUFFAGE POUR CONTRÔLER LE COURANT DE SOUDAGE DANS CETTE SOURCE DE PUISSANCE DE PRÉCHAUFFAGE
Publication
Application
Priority
- US 201762517505 P 20170609
- US 201816003387 A 20180608
- EP 18735131 A 20180611
- US 2018036852 W 20180611
Abstract (en)
A preheating power supply (208) comprising power conversion circuitry and a bypass path prevention circuit (302). The power conversion circuitry includes first and second output power connectors (220, 230) of the preheating power supply (208) wherein the first output power connector (230) is connected to a second output power connector (220) of a different power supply, wherein both the first and second output power connectors (220, 230) are connected to a first contact tip (210), and wherein the power conversion circuitry is configured to output welding-type power to the first contact tip (2109 via the first output power connector and a second output power connector. The bypass path prevention circuit (302) is configured to prevent less than a threshold voltage applied to the first output power connector and the second output power connector from a different power supply from causing current to flow between the first output power connector and the second output power connector. The preheating power supply (208) establishes a preheat current path configured to return to the preheating power supply via the second output power connector of the different power supply.
IPC 8 full level
B23K 9/10 (2006.01); B23K 9/32 (2006.01); H02H 9/04 (2006.01)
CPC (source: EP US)
B23K 9/1006 (2013.01 - EP US); B23K 9/1043 (2013.01 - EP US); B23K 9/1093 (2013.01 - EP US); B23K 9/32 (2013.01 - EP US)
Citation (applicant)
US 201615343992 A 20161104
Citation (search report)
- [XYI] JP S61186172 A 19860819 - BABCOCK HITACHI KK
- [YA] US 5644461 A 19970701 - MILLER CRAIG A [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 11524354 B2 20221213; US 2018354052 A1 20181213; CA 3066740 A1 20181213; CA 3191966 A1 20181213; CN 110997208 A 20200410; CN 110997208 B 20221125; EP 3634680 A1 20200415; EP 3634680 B1 20220803; EP 4039397 A1 20220810; US 11980977 B2 20240514; US 2023075751 A1 20230309; WO 2018227175 A1 20181213
DOCDB simple family (application)
US 201816003387 A 20180608; CA 3066740 A 20180611; CA 3191966 A 20180611; CN 201880050172 A 20180611; EP 18735131 A 20180611; EP 22164117 A 20180611; US 2018036852 W 20180611; US 202217984671 A 20221110